Going all in.

Sometimes, when you have a weak hand, going all in (putting all your chips in the pot) is the only play you have. It allows you to take some control over the game, and forces the other players to reassess their own cards. More often than not, it won't work. But at least you've shown you have balls. And as long as you don't mind walking home, alone with no cab fare, it can be worth it to find out exactly where you stand.